Wall conditioning of JET with the ITER-Like Wall

被引：19
|
作者：
Douai, D. [2 ]
Brezinsek, S. [3 ]
Esser, H. G. [3 ]
Joffrin, E. [2 ]
Keenan, T. [4 ]
Knipe, S. [4 ]
Kogut, D. [2 ]
Lomas, P. J. [4 ]
Marsen, S. [5 ]
Nunes, I. [6 ]
Philipps, V. [3 ]
Pitts, R. A. [7 ]
Shimada, M. [7 ]
de Vries, P. [8 ]
机构：
[1] JET EFDA, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[2] CEA, EURATOM Assoc, IRFM, F-13108 St Paul Les Durance, France
[3] Forschungszentrum Julich, EURATOM Assoc, IEF Plasmaphys, D-52425 Julich, Germany
[4] CCFE, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[5] Max Planck Inst Plasma Phys, EURATOM Assoc, D-17491 Greifswald, Germany
[6] Inst Plasmas & Fusao Nucl, IST, EURATOM Assoc, P-1049001 Lisbon, Portugal
[7] ITER Int Org, F-13067 St Paul Les Durance, France
[8] FOM, EURATOM Assoc, Nieuwegein, Netherlands
来源：
JOURNAL OF NUCLEAR MATERIALS | 2013年 / 438卷
基金：
英国工程与自然科学研究理事会;
关键词：
Glow discharges - Carbon;
D O I：
10.1016/j.jnucmat.2013.01.259
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The initial conditioning cycle of JET ILW is analysed and compared with restart and operation in 2008 with a carbon dominated wall. Comparable water and oxygen decay times are observed during bake-out in both cases. Despite a 2 x 10(-3) mbar l/s leak rate during plasma operation, no further wall conditioning has been necessary after plasma restart in ILW, which dramatically contrasts with 2008. Plasma O content is lower with the ILW. Higher O levels are measured after nights or week-ends, BeO layers being formed and re-eroded, but do not impact plasma operation and performance. First results on isotopic wall changeover by GDC on the ILW six months of the first D-2 campaign evidence a reservoir of about 3 x 10(22) atoms, i.e. ten time lower than in carbon PFCs. A study in JET of the glow discharge current distribution for different ratios of the ionization mean free paths to the vessel dimensions seems to indicate sufficient toroidal and poloidal homogeneity in ITER. (C) 2013 Elsevier B. V. All rights reserved.
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页码：S1172 / S1176
页数：5
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